Fix ::AsciiValue usage error
Fix ::AsciiValue usage error

Encapsulated char is dynamically allocated and goes out of scope
when the ::AsciiValue's dtor is called, so keep the value in scope

Change-Id: If6e3eeed28e1870ee5dd157caac4e443659948c4
Reviewed-on: http://review.couchbase.org/19719
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

KenanSulayman/couchnode,actano/couchnode,ConnectedHomes/couchnode,actano/couchnode,Bloutiouf/couchnode,kshmir/couchnode,GannettDigital/couchnode,jess-sheneberger/couchnode,KenanSulayman/couchnode,brett19/couchnode,ronkorving/couchnode,ConnectedHomes/couchnode,ronkorving/couchnode,jess-sheneberger/couchnode,Bloutiouf/couchnode,jess-sheneberger/couchnode,couchbase/couchnode,ronkorving/couchnode,kshmir/couchnode,Bloutiouf/couchnode,corbinu/couchnode,actano/couchnode,couchbase/couchnode,brett19/couchnode,ConnectedHomes/couchnode,corbinu/couchnode,couchbase/couchnode,KenanSulayman/couchnode,Bloutiouf/couchnode,kshmir/couchnode,ronkorving/couchnode,brett19/couchnode,GannettDigital/couchnode,GannettDigital/couchnode,couchbase/couchnode,KenanSulayman/couchnode,ConnectedHomes/couchnode,corbinu/couchnode,jess-sheneberger/couchnode